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Pneumatic tool having pendulum-like direction switching mechanism

a technology of direction switching and pneumatic tools, which is applied in the direction of manufacturing tools, percussive tools, portable drilling machines, etc., can solve the problems of difficult application of structure to other tools, increased complexity and cost of pneumatic tools, and the inability to use most pneumatic tools easily, so as to reduce the possibility of damage, avoid or reduce the protruding portion of the switching device, and reduce the possibility of collision. the effect of reducing the possibility of collision

Inactive Publication Date: 2012-11-22
HYPHONE MASCH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a pneumatic tool with a pendulum-like direction switching mechanism that allows users to change the rotation direction of the pneumatic motor with a single hand. The tool has a compact structure that reduces service costs and enhances stability. The switching device slides along an arc-shaped route and is connected to the control valve, which is connected to the pneumatic motor. The switching device is designed to minimize damage and unexpected shifting, and its arc-shaped route ensures stability of the tool."

Problems solved by technology

However, as mentioned in TWM293124, most of the pneumatic tools can not be utilized easily since shifting of the switch device has to be implemented by two hands.
Unfortunately, the pneumatic tool provided is produced with two control valves.
As a result, complexity and cost of the pneumatic tool are raised, and the structure is difficult to be applied to other tools.
However, the pneumatic tool provided in TWI319346 and U.S. Pat. No. 7,594,549 still has several disadvantages in practical using.
Secondly, lifetime of the rod and the control valve would be shortened since the rod would be stroke easily, even frequently.
In addition, the rod and the valve would be abraded seriously since the rod may be shifted and switched frequently.
However, the switch device is designed just as the switch devices mentioned above, two-hand operation is necessary or unexpected strike goes frequently.

Method used

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  • Pneumatic tool having pendulum-like direction switching mechanism
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Examples

Experimental program
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Effect test

first embodiment

[0030]Please refer to FIG. 1 to FIG. 5 for the present invention. The pneumatic tool having pendulum-like direction switching mechanism of the present embodiment includes a pneumatic motor 1, a control valve 2, a switching device 3, and a coupling mechanism. Preferably, the pneumatic tool may further include a shell 5 and an impact tool 6.

[0031]The pneumatic motor 1 includes a cylinder 11 and a rotor 12. The rotor 12 is disposed rotatably in the cylinder 11, and the cylinder 11 defines two air passages 111 and 111′. The cylinder 11 is adapted for pressurized air to be input therein via one of the air passages 111 and 111′ so as to drive the rotor 12 to rotate. Furthermore, the cylinder 11 is formed with an extended portion 112, and the extended portion 112 can be formed with a groove 113. The two air passages 111 and 111′ extend to communicate with the groove 113. Besides, the cylinder 11 may define an exhaust passage for air to release after rotating the rotor 12.

[0032]The control ...

second embodiment

[0043]In other embodiments of the present invention, the coupling mechanism can be constructed in other structure. As shown in FIG. 8 and FIG. 9, in the invention, the coupling mechanism includes a buckle groove 43 and a bolt 44. The buckle groove 43 is formed on the switching device 3, and the bolt 44 is disposed on the control valve 2. In some possible embodiments of the invention, the bolt 44 may be rotatably inserted on the tube or the transmitter, or the bolt 44 may be integrally formed on the control valve 2. The bolt 44 is received in the buckle groove 43. The switching device 3 drives the control valve 2 to rotate by the buckle groove 43 and the bolt 44 when the switching device 3 slides along the arc-shaped route.

third embodiment

[0044]Please refer to FIG. 10 and FIG. 11, in the invention, the coupling mechanism includes a convex portion 45 and a buckle groove 46. The convex portion 45 is formed on and protrudes downwardly from the switching device 3. The buckle groove 46 is formed on the control valve. Similarly and alternatively, the buckle groove 46 may be formed on the tube or the transmitter of the control valve 2. The convex portion 45 is rotatably received in the buckle groove 46, so that the switching device 3 can drive the control valve 2 to rotate when it slides.

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Abstract

The pneumatic tool having pendulum-like direction switching mechanism of the present invention includes a pneumatic motor and a control valve. The control valve is utilized for receiving pressurized air and for alternatively leading air into the pneumatic motor to drive and control the pneumatic motor. The present invention further includes a switching device and a coupling mechanism. By connection of the coupling mechanism, the switching device is able to control motion of the valve. In addition, the switching device slides along an arc-shaped route. Thus, the switching device approaches the pneumatic tool without protruding excessively. Therefore, unexpected collision is lessened and lifetime is prolonged.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a pneumatic tool having direction switching mechanism.[0003]2. Description of the Prior Art[0004]Conventional pneumatic tool has pneumatic motor which is driven by pressurized air. Rotor of the motor is rotated by air, driving tool to rotate, so that detachment and attachment of bolts can be processed smoothly. For implementing detachment and attachment operation, most of conventional pneumatic motors are produced with switch devices thereon. For instance, pneumatic tools provided in patents, TWM396733, TWM370470, TWM293124, and TWM284504, are all equipped with similar switch devices. In these pneumatic tools, the switch devices are operated to switch a control valve, interchanging pathways of pressurized air, and rotation direction of the rotors is then changed.[0005]However, as mentioned in TWM293124, most of the pneumatic tools can not be utilized easily since shifting of the switch d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B25B21/02B25D17/00B25D9/12
CPCB25B21/02
Inventor TING, CHIH-MINGCHIANG, YEN-CHE
Owner HYPHONE MASCH IND CO LTD